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Finding the Fourth Proportional to 170,718.40, 256,077.60 and 65,539.90

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Solution

The fourth proportional to 170,718.40, 256,077.60 and 65,539.90 is: 98,309.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,718.40 : 256,077.60 = 65,539.90 : x
  2. Step 2: Convert to fraction form
    170,718.40/256,077.60 = 65,539.90/x
  3. Step 3: Cross multiply
    170,718.40x = 256,077.60 × 65,539.90
  4. Step 4: Simplify right side
    170,718.40x = 16,783,300,296.24
  5. Step 5: Solve for x
    x = 16,783,300,296.24/170,718.40
  6. Step 6: Final answer
    x = 98,309.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.